package thread;

import java.util.ArrayList;
import java.util.Collections;
import java.util.LinkedList;
import java.util.List;

public class SyncApiDemo2 {
    public static void main(String[] args) {
//        List<Integer> list = new ArrayList<>();
//        List<Integer> list = new LinkedList<>();
        List<Integer> list = Collections .synchronizedList(new ArrayList<>());
        Thread t1 = new Thread(){
            public void run(){
                for (int i = 0; i < 1000; i++){
                    list.add(i);
                }
            }
        };
        Thread t2 = new Thread(){
            public void run(){
                for (int i = 0; i < 1000; i++){
                    list.add(i);
                }
            }
        };
        t1.start();
        t2.start();

        try{
            Thread.sleep(50);
        } catch (InterruptedException e) {
        }

        System.out.println(list.size());
    }
}
